<?php
 
class SimpleImage {
   
   var $image;
   var $image_type;
 
   function load($filename) {
      $image_info = getimagesize($filename);
      $this->image_type = $image_info[2];
      if( $this->image_type == IMAGETYPE_JPEG ) {
         $this->image = imagecreatefromjpeg($filename);
      } elseif( $this->image_type == IMAGETYPE_GIF ) {
         $this->image = imagecreatefromgif($filename);
      } elseif( $this->image_type == IMAGETYPE_PNG ) {
         $this->image = imagecreatefrompng($filename);
      }
   }
   function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {

	   // do this or they'll all go to jpeg
	   $image_type=$this->image_type;
	
	  if( $image_type == IMAGETYPE_JPEG ) {
		 imagejpeg($this->image,$filename,$compression);
	  } elseif( $image_type == IMAGETYPE_GIF ) {
		 imagegif($this->image,$filename);  
	  } elseif( $image_type == IMAGETYPE_PNG ) {
		// need this for transparent png to work          
		imagealphablending($new_image, false);
		imagesavealpha($new_image,true);
		$transparent = imagecolorallocatealpha($new_image, 255, 255, 255, 127);
		imagefilledrectangle($new_image, 0, 0, $width, $height, $transparent);
	
		imagepng($this->image,$filename);
	  }   
	  if( $permissions != null) {
		 chmod($filename,$permissions);
	  }

   }
   function output($image_type=IMAGETYPE_JPEG) {
      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         imagegif($this->image);         
      } elseif( $image_type == IMAGETYPE_PNG ) {
         imagepng($this->image);
      }   
   }
   function getWidth() {
      return imagesx($this->image);
   }
   function getHeight() {
      return imagesy($this->image);
   }
   function resizeToHeight($height) {
      $ratio = $height / $this->getHeight();
      $width = $this->getWidth() * $ratio;
      $this->resize($width,$height);
   }
   function resizeToWidth($width) {
      $ratio = $width / $this->getWidth();
      $height = $this->getheight() * $ratio;
      $this->resize($width,$height);
   }
   function scale($scale) {
      $width = $this->getWidth() * $scale/100;
      $height = $this->getheight() * $scale/100; 
      $this->resize($width,$height);
   }
   function resize($width,$height,$forcesize='n') {
	  $new_image = imagecreatetruecolor($width, $height);
	  /* Check if this image is PNG or GIF, then set if Transparent*/  
	  if(($this->image_type == IMAGETYPE_GIF) || ($this->image_type==IMAGETYPE_PNG)){
		  imagealphablending($new_image, false);
		  imagesavealpha($new_image,true);
		  $transparent = imagecolorallocatealpha($new_image, 255, 255, 255, 127);
		  imagefilledrectangle($new_image, 0, 0, $width, $height, $transparent);
	  }
	  imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
	
	  $this->image = $new_image;     
   }      
}
?>

